Use the following balanced equation to answer the question: 2 Fe2O3 +6 Cl2 --> 4 FeCl3 + 3 O2 How many moles of O2 are produced when 1.54 moles of Fe2O3 are used?

Answer 1

You can simply use dimensional analysis...

1.54 mols Fe₂O₃ x 3 mols O₂ / 2 mols Fe₂O₃ = moles O₂

Note that mols Fe₂O₃ cancel, leaving you with mols O₂

1.54 mols Fe₂O₃ x 3 mols O₂ / 2 mols Fe₂O₃ = 2.31 moles O₂